What objects did Archimedes use to test the density of the gold crown? How can a modern investigator identify the elements in paint?

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm

All of the following are part of the biosphere except

How are isotopes of the same chemical element alike? how are they different?